Hidden Rule

Both [name_f]Ivy[/name_f] and [name_m]Daphnis[/name_m] are valid

[name_f][/name_f]

Valid: [name_m]Arthur[/name_m], [name_f]Ivy[/name_f], [name_m]Daphnis[/name_m]
[name_f][/name_f]Not valid: [name_f]Zelie[/name_f], [name_m]Ronan[/name_m]